Answer: The solution to the system of equations is the same as the intersection coordinates of the two lines representing the equations in the system.
For your second question
1. There ARE TWO POINTS where the line for the equation y=2x+2 intersects the parabola.
2. There IS ONE POINT where the line for the equation y=1 intersects the parabola.
3. There IS NO POINT where the line for the equation y=2x-4 intersects the parabola.